-Try your best to keep the Water pump a separate component from the
housing, or
design a COMPLETE removable Water pump cartridge (Impeller seat and
all) that can be
replaced in its entirety by Un-BOLTING it from the Housing (Quite
do-able).

That is such a good idea.  Best if you can get the whole thing in and
out leaving the main pulleys in place.  So try to keep the mounting
bolts away from the centerline.

Hans

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